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We examine observational characteristics of multi-phase turbulent flows in the diffuse interstellar medium (ISM) using a synthetic radiation field of atomic and molecular lines. We consider the multi-phase ISM which is formed by thermal…

Astrophysics · Physics 2008-11-26 M. Yamada , H. Koyama , K. Omukai , S. Inutsuka

The hot intracluster medium (ICM) provides a unique laboratory to test multi-scale physics in numerical simulations and probe plasma physics. Utilizing archival Chandra observations, we measure density fluctuations in the ICM in a sample of…

High Energy Astrophysical Phenomena · Physics 2024-01-30 Annie Heinrich , Irina Zhuravleva , Congyao Zhang , Eugene Churazov , William Forman , Reinout J. van Weeren

How does turbulence contribute to the formation and structure of the dense interstellar medium (ISM)? Molecular clouds are dense, high-pressure objects. It is usually argued that gravitational confinement causes the high pressures, and that…

Astrophysics · Physics 2017-01-18 Mordecai-Mark Mac Low

The ISM, powered by SNe, is turbulent and permeated by a magnetic field (with a mean and a turbulent component). It constitutes a frothy medium that is mostly out of equilibrium and is ram pressure dominated on most of the temperature…

Astrophysics of Galaxies · Physics 2010-10-28 Miguel A. de Avillez , Dieter Breitschwerdt

Photoionizing radiation and stellar winds from massive stars deposit energy and momentum into the interstellar medium (ISM). They might disperse the local ISM, change its turbulent multi-phase structure, and even regulate star formation.…

Astrophysics of Galaxies · Physics 2018-06-06 Sebastian Haid , Stefanie Walch , Daniel Seifried , Richard Wünsch , František Dinnbier , Thorsten Naab

We compare the central mass distribution of galaxies simulated with three different models of the interstellar medium (ISM) with increasing complexity: primordial (H+He) cooling down to 10^4K, additional cooling via metal lines and to lower…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Charlotte Christensen , Fabio Governato , Thomas Quinn , Alyson M. Brooks , David B. Fisher , Sijing Shen , Jacqueline McCleary , James Wadsley

We use hydrodynamical simulations in a $(256\;{\rm pc})^3$ periodic box to model the impact of supernova (SN) explosions on the multi-phase interstellar medium (ISM) for initial densities $n = 0.5-30$ cm$^{-3}$ and SN rates $1-720$…

The interstellar medium (ISM) is an inseparable part of the Milky Way ecosystem whose evolutionary history remains a challenging question. We trace the evolution of the molecular ISM using a sample of Young Stellar Objects (YSO) association…

Astrophysics of Galaxies · Physics 2022-07-20 Guang-Xing Li , Ji-Xuan Zhou , Bing-Qiu Chen

We studied the linear and nonlinear evolution of the Vertical Shear Instability (VSI) in axisymmetric models of protoplanetary disks, focusing on the transport of angular momentum, the produced temperature perturbations, and the…

Earth and Planetary Astrophysics · Physics 2024-02-19 Julio David Melon Fuksman , Mario Flock , Hubert Klahr

The observed low densities of gas giant planets with a high equilibrium temperature can be simulated in models when a fraction of the surface radiation is deposited deeper in the interior. Meanwhile migration theories suggest that hot…

Earth and Planetary Astrophysics · Physics 2020-06-10 Marit Mol Lous , Yamila Miguel

Spiral shocks are potentially a major source of turbulence in the interstellar medium. To address this problem quantitatively, we use numerical simulations to investigate gas flow across spiral arms in vertically stratified,…

Astrophysics · Physics 2011-02-11 Chang-Goo Kim , Woong-Tae Kim , Eve C. Ostriker

Observations have suggested substantial departures from pressure equilibrium in the interstellar medium (ISM) in the plane of the Galaxy, even on scales under 50 pc. Nevertheless, multi-phase models of the ISM assume at least locally…

Astrophysics · Physics 2007-05-23 Mordecai-Mark Mac Low , Dinshaw Balsara , Miguel A. Avillez , Jongsoo Kim

We use a suite of numerical simulations to investigate the mechanisms and effects of radial migration of stars in disk galaxies like the Milky Way (MW). An isolated, collisionless stellar disk with a MW-like scale-height shows only the…

Astrophysics of Galaxies · Physics 2015-05-27 Jonathan C. Bird , Stelios Kazantzidis , David H. Weinberg

Context. The dynamics of a low-mass protoplanet accreting solids is influenced by the heating torque, which was found to suppress inward migration in protoplanetary disks with constant opacities. Aims. We investigate the differences of the…

Earth and Planetary Astrophysics · Physics 2019-06-26 Ondřej Chrenko , Michiel Lambrechts

Recent hydrodynamical simulations predict that stellar feedback in intermediate mass galaxies (IMGs) can drive strong fluctuations in structure (e.g., half-light radius, $R_e$). This process operates on timescales of only a few hundred Myr…

Astrophysics of Galaxies · Physics 2018-10-24 Shannon G. Patel , Daniel D. Kelson , Nicholas Diao , Stephanie Tonnesen , Louis E. Abramson

In star forming disk galaxies, matter circulation between stars and the interstellar gas, and, in particular the energy input by random and clustered supernova explosions, determine the dynamical and chemical evolution of the ISM, and hence…

Astrophysics · Physics 2009-11-10 Miguel A. de Avillez , Dieter Breitschwerdt

In isothermal disks the migration of protoplanets is directed inward. For small planetary masses the standard type-I migration rates are so fast that this may result in an unrealistic loss of planets into the stars. We investigate the…

Astrophysics · Physics 2015-05-13 Wilhelm Kley , Aurelien Crida

Radial transport of particles, elements and fluid driven by internal stresses in three-dimensional (3D) astrophysical accretion disks is an important phenomenon, potentially relevant for the outward dust transport in protoplanetary disks,…

High Energy Astrophysical Phenomena · Physics 2017-03-15 Alexander A. Philippov , Roman R. Rafikov

Low-metallicity environments are subject to inefficient cooling. They also have low dust-to-gas ratios and therefore less efficient photoelectric (PE) heating than in solar-neighbourhood conditions, where PE heating is one of the most…

We present a new simulation suite for the star-forming interstellar medium (ISM) in galactic disks using the TIGRESS-NCR framework. Distinctive aspects of our simulation suite are: (1) sophisticated and comprehensive numerical treatments of…